The best fighter is the Spitfire Mk XIV. Yeah, there are some planes that turn tighter, fly faster, fly further, climb faster, roll better, carry more ord, or have more gun firepower... but nothing can compare when the total packaged ability is taken into account for air to air battles. The F4U-4 is not an easy plane to fly and it takes far more experience and knowledge to fly as well it the aircraft is able.
The Spit16 can all things very well. The worst thing about the Spit16 is its range... and even then it can fly fo 30 min or so.